---js
(() => {
require(`fs`).writeFileSync(`${process.cwd()}/cypress/fixtures/file-to-attempt-rce-on.txt`, (new Error('Helpful stack trace if this does execute. It should not execute.')).stack)
console.trace()
return {
title: `I should not be parsed`
}
})()

---

<h1>JS frontmatter engine is disabled by default</h1>

<span data-cy="js-frontmatter">
  {props.pageContext.frontmatter?.title || `disabled`}
</span>
